Improvement in coating oakum with tar



UNITED STATES JOHN F. STAIRS, OF HALIFAX, CANADA.

IMPROVEMENT IN COATING OAKUM WITH TAR, &c.

Specification forming part of Letters Patent No. 146,105, dated December 30, 1873; application filed December 3, 1873.

To cllrwhom it may concern:

Be it known that I, JOHN F. STAIRS, of Halifax, in the Province of Nova Scotia, (lanad'a, have invented an Improvement in Tarring Toyv and Oakuin, of which the following is a specification: v

.Tow and oakum have been tarred in mass, and difliculty arises in applying suoli tar with uniformity. My machine is made for tarrin g the tow or oakum with uniformity and in detail, so that the ultimate proportion of tar to liber can be regulated at Will.

I make use of rollers in the tar, through which the sliver of tow or oakum passes, and by means of which the tar -is worked into the liber. lThe sliver is then passed `through a concentrating-tube and a pair of rollers above the tar, that press out the surplus tar, and according to the pressure applied, so a greater or less amount of tar will remain. y

In the drawing, Figure l is a vertical section of the machine, and Fig. 2 is a plan.

Thesliver of tow or oakum passes from any suitable machine or holder in between the feed-rollers a a, down the inclined trough b, into the tar contained in the tank or kettle c, and itis preferable to employ heat, so that the tar will be more limpid. The sliver passes between two or more pairs of rollers, d d, c c, ff, that are in the tar, and serve to work the same thoroughly. into the fiber. The concentrating-tube h serves to direct the sliver in a compact roving between the rollers 7c I, that press out the surplus tar.

It is preferable to use a grooved roller, kv into the groove of which the roller l passes, so

that the roving or sliver is preserved in a com- If the sliver is suili cientl y strong to be drawn through between the respective rollers and through the tar, then the rollers d c f will not require to be driven by power. It is, however, f

generally necessaryto `apply gearing, as shown, on equivalent mechanism for revolving the said rollers.

By the means aforesaid any desired quantityof tar can be applied to the oakum or tow, and great uniformity in the `proportion' is obtained. L

I claimas my inventioni The means described for tarring Vtow or oakum, consisting of the rollers a,.trongh b,

concentrating-tube lz., and .squeezingrollers k l, in combination with the tar-kettle c and a pair of rollers in such tar-kettle, substantially as set forth.

Signed -by me this 29th day of November,

A. D. 1873. u

JOHN F. STAIRS. Witnesses:

GEO. T. PINCKNEY,

OHAs. H. SMTTH;

PATENT OEEIoE I 

